DIgSILENT PowerFactory Application Guide Dynamic Modelling Tutorial DIgSILENT Technical Documentation DIgSILENT GmbH Heinrich-Hertz-Str. 9 PowerFactory is easy to use and fully Windows compatible and can be integrated DIgSILENT YouTube channel; Interactive introductory tutorial and various. PowerFactory is a leading integrated power system analysis software, which covers the full range of functionality from standard features to highly sophisticated .

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## General Software Information

Models that contain highly sensitive data e. However, special courses can be provided upon request. This is generally for variables or signals that cannot be determined directly from the load flow solution. The incfix statement, on the other hand, defines a fixed initial condition for the variable.

This can typically be done with the inc and incfix statements. Suppose that the frame represents the connections of a generator Slot A to a voltage diysilent Slot B. However at this stage, we ppwerfactory have blueprints for the system which are located in the library. The state variable x should be initialised to the steady state output yo,ss.

The general rule is that in the steady state, all derivates are zero, i.

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There are three iterative search algorithms available in Powerfactorry The gate position is controlled by a governor system, which tries to keep the output of the generator at a constant frequency. Higher-level representations such as graph- cigsilent block diagrams and nested block structures are automatically converted to a set of DSL equations, which are then parsed and interpreted during the simulation.

To specify the type use e. Hydro turbine common model and parameters Figure 5.

At this stage, we have just seen an overview for how the hydro generation control system is structured i. We can redraw this block diagram for the steady state condition with all derivatives set to zero. We can first create a composite model and link it to the composite frame we defined earlier see Figure 2. It can be used for model parameters as well as internal signals.

March 21, — March 22, Grid connection of renewable opwerfactory S These signals and variables will then be displayed in the data manager as shown in Figure 5. The output signal pt is known from the generator element, but the input signal g is unknown, and must be digsikent initialised. If there is a problem with one common model, try to put the common models that are not directly connected or related to the problem model out of service.

Suppose that both generators use the same type of Basler voltage controller. In the end, the complete composite model is shown in Figure 2.

PowerFactory does not check the initial conditions for a macro since they are assumed to be defined elsewhere i. Prentice Hall, fifth edition, This is normally used in ambiguous sitations where the value of one or more variables needs to be fixed. By staying here you are agreeing to our use of cookies. Using the flexible data window to view oowerfactory signals and variables 5.

PowerFactory offers two functions to make DSL models more portable for reuse: Create a composite model and fill the slots with the relevant grid elements, e. Works only with fixed limits, i. In this system, the digsileny of water flowing into the penstock is controlled by a control gate at the intake.

Once a model definition has been selected, the parameters of the common model can be digsilnet for example, see Figure 3.

Composite models are created from within a data manager e. Model definitions are type objects that belong in the equipment type library. Note that as mentioned earlier, there is already a built-in model for the synchronous generator element and therefore does not require an additional definition. Consider the frame in which the composite block is located and how it will be connected to other slots. Calculate the unknown signals and variables from the known quantities In the hydro turbine example, tuforial worked backwards from the known output pt to calculate the unknown steady-state input g, as well as the quantity U for the integrator state variable.

## Power System Software & Engineering

powerfactoryy It is implemented in DSL using a state variable x as follows: PowerFactory recognises whether the block definition is a composite frame or a model definition based on the first block or slot that is drawn in the diagram.

Only the references are exported and if the other databases do not contain the same reference macros or primitive blocks or they have been modifiedthen digeilent model will not function as intended. Hydro Turbine Block Initialisation.

Stores the value x Tnow and returns the value x Tnow-Tdelay. Block definitions can be digsileht from both equations and graphical block diagrams. We also have the option of initialising the internal signals that make up g i.

In the hydro turbine example, we saw that pt is connected to the synchronous generator and thus known from the load flow calculation. An understanding of numerical simulation, particularly the concepts of state-space representations and solutions to differential-algebraic equations DAE is also desirable, but not essential. A model definition containing only equations is called a primitive block definition, while a model definition with a graphical block diagram is referred to as a composite block definition.

The input signal g should be initialised such that the model equations yield pt at the output more on block initialisation later. Common models are created from within a data manager e.